Is HEL-SIN ( and what a combo) a non-stop? I remember that a few years ago, AY flew non-stop to BKK, and then had a tag on flight to either HKG or SIN (depending upon the day of the week). Once HEL-HKG became non-stop, the flights to SIN were dropped.

ETA: Actually SIN-> HEL is the better way to go...